Error when building the kernel for Radxa Zero 3E using BSP

I read it yesterday. But I never found out.
‘-r, --revision [num] Specify custom revision number, default=1’
What exactly does -r --revision [num] mean? For the case 5.10.160-26-rk356x, is this the number 26?
The help works without -h )) if only it would help more ))
I started to go deeper and now
https://radxa-repo.github.io/artifacts.html